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MACHINERY FOR INSER'TING SCREWS INTO LEATHER OR OTHER MATERIAL. No. 519,215 Patented May 1, 1894.

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M. WIEDBRIN. MACHINERY FOR. INSBRTING SCREWS INTO LEATHER OR OTHER MATERIAL.

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WI'BDERIN.

MACHINERY FOR INSBRTING SCREWS INTO LEATHER OR OTHER MATERIAL. No. 519,215. Patented May 1,1894.

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M. WIEDERIN. MAGHINBRY FOR INSERTING SCREWS INTO LEATHER OR'OTHER MATERIAL No. 519,215. Patented May 1,1894;

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. 'llNrTn STATES PATENT FFICE;

MATHAUS WIEDERIN, 0F FRASTANZ, AUSTRIA-HUNGARY, ASSIGNOR OF ONE-HALF TO FRIEDRICH MAERKY, OF SAME PLACE.

MACHINERY FOR INSERTING SCREWSINTO LEATHER OR OTHER MATERIAL.

SPECIFICATION forming art of Letters Patent No. 519,215, dated. May 1, 1894.

Application filed December 4, 1893. Serial No. 492,763. (No model.) Patented LXVIIL67.

To all whom it may concern.-

Be it known that I, MATHKUs WIEDERIN, a subject of the Emperor of Austria-Hungary, residing atFrastanz, inthe Province of Vorarl-berg, in the Empire of Austria-Hungary, have invented certain new and useful .Improve ments in Machinery for Inserting Screws into Leather or other Material, (patented in Italy, VolfXXXVIII, No. 34,653, and Vol.

LXVIII, No. 67,.dated September 30, 1893;) and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains'to make and usethe same, reference being had to the accompanying drawings, and to letters or figures of ref erence marked thereon, which form a part of this specification. My invention has relation to screw driving machines and more particularly to machines for securing, the soles to boots and shoes by means of headed screws in lieu of the nails, pegs, or Wire screws heretofore employed for this purpose, as will now be fully described,

reference being had to the accompanying drawings, in which Figure 1 is a front elevation; Fig. 2 a sectional side elevation, and Fig. 3 a plan View of a machine embodying my invention. Figs. 4: to 11 are detail views of partsof said machine. r l

Similar letters and numerals refer to like parts wherever such may occur in the above described figures of drawings.

The operative devices are supported from a frame of appropriate construction, F indicating the bed plate provided with asultable recess F affording the necessary space for the operation of some of the devices.

On the bed plate F and at a proper elevation above the sarneis supported a revoluble holder or magazine G, for the screws, said magazine consisting of a circular series of open ended vertical tubes fof the same, or preferably, of different diameters, so as to adapt the same for the reception of screws of dilferent sizes, or screws the heads of which differ in diameter, said tubes being secured in. head plates gf g suitably perforatedfo'r in Italy September 30, 1893, XXXVIII, 34,653,

a vertical spindle G fast on the bed plate F, the magazine G revolving freely about said spindle. The lower end of the tubes is normally closed by a gate G Fig. 1, and by a disk or ring 9 supported by brackets 9 Figs. 1 and 2, on the bed plate F. Inthis disk and at a suitable point so as to register with the tubesfwhen the magazine is properly positioned, is formed a feed opening f, Figs. 4, 6 and 7, in which is screwed an open-ended delivery tube f Figs. 2, l, 6 and 7, that extends downward into the recess F of thebed plate F, the lower open end of said tube being preferably flush with the under side of the table. The tube f has a collar or circuoular flange f that abuts against the under side of the disk or ring g-and is also provided with two forked lugs diametrically opposite each other, in each of which is pivoted a le ver 70 constructed in two parts, the lower part I0 being hinged to the upper part in such tion but not inthe other. Each of said levers it has a lug or horn 2 projecting from its fulcrum bearing against which bears one end "of a leaf spring 3 whose other end has bearing against the annular flange f on tube f said springs tending to move the levers'toward said tube, see Fig. 4:- Ata certain distance from its delivery end the tube f has tWo holes diametrically opposite each other, and each of the levers 7r. has a shouldered stop pin Ir projecting through said holes into manner as to yieldto pressure in one directhe tube sufficiently far to prevent the head of a screwS from slipping by, as shown in Fig. 4. r

In the under side of the lower head plate or ring g of the magazine G are formed recesses adapted to be engaged by a spring actuated locking pin f shown in dotted lines in Fig. 1 and in full lines in Fig. 9, said pin having its hearings in one of the bracket supports g 'for the ring 9 of magazine G. These recesses are so arranged relatively to the tubular holders f and the feed opening f in ring g that Whenever the pin f engages one of the recesses'one of said tubular holders f will be in register with said opening. A main driving shaft (1. has

its bearings in standards A rising from the bed plate F of the frame, and has secured thereto a fly wheel a, astepped grooved pulley a a worm E and a bevel pinion 1), Figs. 1, 2, and 3. The shaft a is conveniently revolved by a treadle mechanism of any well known construction, not shown in the drawings, and connected with the step pulley or in a well known manner so that the speed of rotation of the shaft may be varied in accordance with the length of the screws to be driven.

The screw driver B is secured toa stock B that is adapted to revolve and reciprocate verticallyin bearings b on the framing of the machine, the said stock carrying a bevel pinion b' driven by a pinion b onshaft a, said pinion having rotary motion in the upper bearing 19 and is connected with the stock b by groove and feather in a well known manner, so as to allow said stock to move endwise therein.

Endwise motion is imparted to the driver stock 13 through the medium of a two armed lever C havinga fixed fulcrum 0, one of the arms of said lever carrying a weight 0' and having a laterally projecting pin 0 preferably provided with an anti-friction roller that has bearing on the face of double cam D secured to a counter shaft e carrying a worm wheel E in gear with the Worm E on main shaft a. The outer arm of lever O is constructed of two parts adapted to slide on or within one another, the part 0 being tubular while the part c that has endwise motion in said tubular portion terminates in a fork pivotally connected with a sleeve b adjustable longitudinally of the stock B through the medium of two collars 5, secured to said stock by means of set screws 6 whereby the amplitude of the endwise motion of the said stock can be regulated according to the length of the screws to be driven. These devices are clearly shown in Fig. 2. V

Below the screw driver, and depending from the front of the bed plate F is arranged a plate v0 whose under side is serrated, and serves, together with the work support, not shown, to hold the work firmly in position while the screws are being driven. To the under side of said bed plate is also secured a segment or segmental plate It, Figs. 1, 2, 4: and 6, that extends from the delivery tube f nearly under the screw driver 13 and serves as a support for the free end of a feed lever H that feeds the screws one after another to the holder under the screw driver. The lever II is secured below the bed F to the lower end of a vertical spindle 71 that is quickly revolved in one direction, namely from the screw driver to the delivery tube f by aspring h coiled thereon,

while said lever has a slow feed motion imparted thereto from said delivery tube f to said screw driver as follows: At its upper end the spindle it carries a pinion t in gear; with a double cam J on counter shaft e, Figs. 1 and 3. When the shaft e is revolved in the direction of arrow on worm wheel E, Fig. 2, the toothed segment I is revolved in the direction of its arrow, thereby revolving the lever spindle h in the direction of its arrow Fig. 3, and moving the free end of lever H from the delivery tube f3 to and under the screw driver B. During this movement of the lever H and its spindle h2 the tension of the spring h on said spindle is considerably increased and inasmuch as the free end of springj drops from the higher to the lower portion of the cam J about the time the free end of the lever comes under the screw driver, said lever is rapidly moved back to its normal position with its free end under the delivery tube f At its said free end the lever His provided with an open ended tubular carrier h having an outwardly flaring mouth to properly guide and center the screws within it as they drop from tube f and inasmuch as the open-ended carrier at the free end of the lever H slides on the segment h as hereinbefore stated, the screw in said carrier cannot drop out until the carrier has moved clear of said plate h.

The carrier h has secured thereto a cam plate Z of triangular shape, Figs. 2, 4., 5 and 6, with its apex turned toward the delivery tube f When the lever moves away from said tube the base or wider end of the plate Z contacts with the lower section of the levers 7c, and as these are so hinged to the upper section as to turn freely away from the tube f the plate and carrier pass readily from under and between them. When, on the other hand, the lever H is moved by the spring 72. under the tube f the said levers are spread apart by the triangular or cam plate Z, whereby the stop pins 70' are withdrawn from the delivery tube f sufficiently to allow the lowermost screw S held by said pins to drop into the carrier to be carried under the screw driver B at the next feed vibration of lever H.

In order that the screws as they are fed to thcscrew driver may be properly positioned or centered on the work relatively to the screw driver, I provide asuitable centering device or tongues, Figs. 1, 3, 10 and 11 consisting of two jaws m m having a reciprocal motion in front of the work retaining plate 0, the ends of said jaws being suitably recessed for the reception of a screw and its head, see Fig. 10, the axis of the recess of said jaws lying in the axial plane of the screw driver B when said jaws are closed upon each other, and immediately below the axis of the carrier 72 on feed lever H when said lever has reached the limit of its feed motion, at which time it has also moved bearingon the outer faceof their respective levers so that said jawsare prevented from dropping down, butare free to move in an upward direction and adjust themselves to screws of different dimensions.

The levers M M arefulcrumed at m m in longitudinal slots formed in-a cross head Z on a sleeve 'n? loose on the stock B of the screw driver B,

see Fi s. 1 and 2 s rin s n'n secured to said cross head Z having bearing on the inner face 4 of said levers and tending to move them and? consequently the jaws m m apart.

The cross head Z is supported from the free end of a spring Z wound on an arbor 12, Figs. 1 and 2,

whereby said cross head Z the levers M M and the retaining jaws m m are yieldingly supported, and any liability of their being carried along with the stock B by frictional contact prevented. The levers MM are guided in slots formed in the endsof cross bars 8, 8, projecting laterally from the lower bearing 17 for the stock B, and by. means of pins 9 and set screws 10 the amplitude of the reciprocal motion or vibration of the said sleeves can be adjusted within proper limits. To the upperarm of each of the levers M M is secured a cam or beveled plate m presenting their cam or beveled faces to the stock B of the screw driver;

B, and said stock has secured thereto a cone wheel 01. adapted to operate on said cam plates miwhen the stock moves. upwardlyto the position shown in Fig. 1, thereby holding the retaining jaws m m together, whereby the screw S between them is held in position to be driven by the screw driver B. As the, stock B of screw driver B descends, the cone wheel or allows the cam plates m to gradually approach the stock .B, whereby the lower arms ot'lthe levers. M M and vwith them the jaws m m are gradually spread apart by the springs n to release the screw S held between i said jaws. This operation takes place as soon as the screw driver has taken hold of the screw andcommenced to drive the same into the work.

The operation of the machine may be briefly described as follows: The tubular screw holders f being filled with screws with their points downward, as shown in Fig. 1, the gate G of the holder f containing the size of screws to be driven is pulled out and the magazine G revolved until the particular tube is in register with the openingf in disk or ring gin which position it will be locked against further accidental rotation by the spring actuated pinf some of the screws in said tubular holder dropping into the delivery tubef the lowermost screw being held by the stop If the levers k k are now moved away from thetubef by hand and irnmediatelyreleased, or if themain shaft 0t is revolved so as to move the feed lever H to v the screw driver, said lever will immediately move back again and its cam plate Z will move said levers k is away from feed tube f whereby a screw S is allowed to drop into the carrier h at the end of said lever H, and the next succeeding screw held by the stop pinsk k.

Assuming that the several operative elements are now in the position shown in Figs. land 2, a further revolution of the shaft (twill cause the stock B of the screwdriver B to revolve also through the medium ofthe pinions b and b,at the same time the worm E will revolve the worm wheel E inthe direction of arrowon the latter, and with said worm wheel the countershaft e and thedouble cams D and J thereon. The cam D will gradually lift the weighted arm of lever Ocausing the driver stock B to gradually descend while the cam J operating on the free end of the springjto which segment gear I is secured will turn the latter, and therethrough the pinion 2' in the direction of the arrows, Fig. 1, whereby the spindle b will move feed lever H slowly along the segment 72. against the stress of the spring h on said spindle, thelower hinged arms k of levers k kbeing lifted by cam plate Z asthe feed lever moves from under the delivery tubef As the stock B descends, the cone wheel or disk'n, on said stock allows the levers M M and therethrough the retaining jaws m m to approach each other under, the stress of the springs n n. When the carrier of the feed lever has reached the limit of its motion to and under the stock B clear of the segment h, the levers M M and jaws m m will have reached the limit of their motion toward each other, so that the screw S in the carrier will drop into the recess between said jaws. At the same time the springj will drop from the higher point of one portion of cam J onto thelower part, allowing the lever 11 to spring or rapidly move back under the delivery tube f at the same time the cam plate l moves the levers 70 7c apart,allowing the lowermost 'screw in feed tube f to drop into carrier h, said levers moving back instantly to hold the next succeeding screw in said tube. The stock B continues to revolve and descend until the screw driver impinges upon the screw head and drives the screw into the work, at which time the springs n acting on the le-. vers M M have caused the retainingjaws m m to gradually move apart inproportion as the head of the screw approaches thework, and finally to release the screw, the stock B continuing to revolve and descend until the screw is driven home, at which time the pin a (or its anti-friction roller) on lever C will drop from one of the noses of the double cam D, when the stock B will spring back, or will be rapidly moved back to its normal elevated position by lever C under the stress of its weight 0. During this upward movement of the stock B the cone wheel impinging upon the cam plates again closes the jaws m m ready to receive the next screw, the described operations being repeated at each half revolu: tion ofthe worm wheel E, thatisto say, two.

screws are fed to the screw driver and driven Into the work at each revolution of the said worm wheel. a

Having thus described m y invention, what ITO I claim as new therein, and desire to secure by Letters Patent, is

1. In a machine of the class described, the combination with a revoluble and endwise movable screw driver and a centering device comprising reciprocally movable jaws for centering a screw relatively to said driver, of a vibratory feed lever for feeding one screw after another to the centering device, said lever provided at its free end with an open-ended carrier of greater interior diameter than that of the head of a screw, and means for closing the delivery end of said carrier until it reaches the centering device, for the purpose set forth.

2. In a machine of the class described, the combination with a revoluble and endwise movable screw driver, a centering device for centering the screw to be driven relatively to the driver, and avibratory feed lever for feeding one screw after another to said centering device, of a delivery tube for the screws, and a movable stop engaging the lowermost screw in the delivery tube, said stop controlled by the movement of the feed lever in one direction, for the purpose set forth.

3. In a machine of the class described, the combination with a revoluble and endwise movable screw driver, a centering device for centering a screw relatively to the driver, a multitubular magazine having tubes of different interior diameter adapted to be brought into register with a delivery tube; of a vibratory feed lever provided with an open ended screw carrier whose interior diameter is substantially equal to that of the magazine tube of greatest interior diameter, and means for closing the delivery end of said carrier during its movement to and from the delivery tube and centering device, for the purposel g-ing mechanism working on the rigid arm of 4. In a machine of the class described, the combination with a revoluble and endwisej set forth.

movable screw driver, a centering device for centering a screw relatively to the driver, a fixed plate provided'with a single deliveryl aperture, a magazine comprising a series of open-ended tubes of different interior diameters arranged concentrically with and revoluble about a common axis and adapted to be brought into register with the aperture in the aforesaid plate, and a delivery tube connected with said aperture; of a vibratory feed lever provided with an open-ended screw carrier whose interior diameter is substantially equal to that of the magazine tube of greatest interior diameter, and means for closing the delivery end of the carrier during its movements to and from the delivery tube and centering device, substantially as and for the purpose set forth.

5. In a machine of the class described, a magazine for the screws comprising open ended vertical tubes arranged concentrically with and revoluble about a common axis, in combination with a gate at the lower end of each tube, and a circular plate or ring below the same provided with a single screw passage in the plane of rotation of said tubes, and a locking device to lock the magazine against rotation, for the purposes set forth.

6. In a machine of the class described, the combination with the heads g of the magazine G provided with axial bearings, theshaft G passing freely through said bearings, and the open ended tubes f secured in said heads, of a gate G for each of said tubes, the fixed retaining ring or disk g provided with a single screw passage f adapted to register with any one of the vertical tubes, and a spring actuated locking pin adapted to engage a recess in the under side of the lower magazinehead.

7. The combination with a screw driver stock, a pinion connected therewith by groove and feather, a sleeve on said stock, and a weighted lever pivotally connected with said sleeve, of a driving shaft, a pinion thereon in gear with the one on the driver stock, a counter shaft driven from said driving shaft,and a cam on said countershaft working on the weight end of the lever, substantially as and for the purpose set forth.

8. The combination with a screw driver stock, a pinion connected therewith by groove and feather, a sleeve adjustable longitudinally of the stock, and a weighted lever pivotally connected with said sleeve, of a driving shaft, a pinion thereon in gear with the one on the driver stock, a counter shaft driven from said driving shaft, and a cam on said counter shaft working on the weight end of the lever, substantially as and for the purpose set forth.

9. The combination with a screw driver stock and a sleeve thereon, of a two-armed lever one of which arms is extensible and pivotally connected with the sleeve, and actuatsaid lever to impart a vibratory motion thereto, for the purpose set forth.

10. The combination with the screw driver, a delivery tube for the screws provided with two openings diametrically opposite each other, and stop pins normally within said openings in the path of the screws, of a vibratory feeding device for feeding the screws from the delivery tube to the driver, and actuating mechanism controlled by the feeding device when vibrated in one direction to move the stop pins out of the path of said screws, for the purposes set forth.

11. The combination with the screw driver, a screw delivery tube provided with two openings diametrically opposite each other, and spring actuated stop pins normally within said openings in the path of the screws, of a vibratory feedingdevice forfeeding the screws from the delivery tube to the screw driver, and actuating mechanism controlled by the feeding device when vibrated in one direction to move the stop pins'against the stress of their springs out of the path of the screws, for the purpose set forth.

12. The combination of the vibratory feed lever H provided at its free end with the carrier h having cam plate Z, with tube f the spring actuated levers k k pivotedi to opposite sides of saidtube in the path of the feed lever and provided each with a shouldered stop pin projectinginto saidftube in the path of the screws, said levers constructed of two parts hinged together to yield when the feed lever moves away from the delivery tube, substantially as and for the purpose set forth. l l

13. The combination withthe feed lever H and its spindle h carrying pinion 'i, of means for imparting a slow rotation to said spindle in one direction and a rapid rotation in a re- Verse direction, consisting of a segment gear meshing with the pinion, said gear having an elastic arm, a revoluble cam working on said spring arm, and a coiled spring on the spindle brought under tension when the latter is revolved by the gearing, substantially as and for the purpose set forth.

14:. The combination with a revoluble and endwise movable screwdriver stock, of a centering device for centering a screw to be driven relatively to the same, and actuating mechanism controlled by the upward movement of the stock to close said jaws against the stress of the springs, for the purpose set forth.

15. The combination with a revoluble and endwise movable screw driver stock, of a censtantially as and for the purpose set forth.

17. The combination with a revolubleand endwise movable screw driver stock and a conical wheel thereon, of centering devices for centering a screw to be driven relatively to the driver, comprising two reciprocally movable jaws, an actuating lever for each of said jaws provided with a cam projection in the delivery driver, comprising two aws, springs acting thereon to open thesaid jaws, for the purpose loosely centered on the stock, and springs acting on the levers to open the jaws,sub-

stantially as and for the purpose set forth.

18, The combination with a revoluble and endwise movable screw driver stock and a conical wheelthereon, of centering devices for centering the screw to be driven relat vely to the driver, comprising two reciprocally movablejaws, an actuating lever for each of said jaws provided with a CEtmPI fOJBEZtlOD lH the path of the wheel on the stock, said parts loosely centered on the stock, a resil ent support for said levers and jaws, and springs acting on the levers to open the jaws, substantially as and forthe purpose set forth. 19. The. combinationwith a revoluble and endwise movable screw driver stock, and a sleeve n through which said stock passes freely, of two levers supported from the sleeve on opposite sides of the stock, said levers having their fulcra adjustable toward and from said stock, a cam plate as m and a jaw as m respectively at the upper and lower end of each lever, and springs n acting'on the levers to move the jaws apart, substantially as and for the purpose set forth.

21. The combination with the stock B, its

cone wheel at, and the yieldingly supported sleeve 01. through which the stock passes freely, of the levers M M provided at one end with a jaw as m and at the other with a cam plate as m in the path of the cone wheel, springs acting on the levers to move the aws apart, and means for adjusting the amplltude of vibration of said levers, substantially as and for the purpose specified. 2

In testimony whereof I affix my signature in presence of two witnesses. it

i i MATI-IAUS WIEDERIN. 'l itnessesr i DEAN B. MASON, y

' SAMUEL KLATSCHSKY. 

